The invention relates to a steering gear (11) for a vehicle having a helical gear (19), the helical gear (19) having a first gear wheel (21) and a second gear wheel (22) which engages with the first gear wheel (21), a first rotation axis (23) of the first gear wheel (21) being aligned so as to be transverse to a second rotation axis (24) of the second gear wheel (22), and an axis perpendicular (25) being aligned so as to be orthogonal to the first rotation axis (23) and to the second rotation axis (24), a smallest spacing between axes (26) between the first rotation axis (23) and the second rotation axis (24) coinciding with the axis perpendicular (25), and an engagement line (33) resulting by means of common contact points (34) of the two mutually engaged gear wheels (21, 22). In order to increase the diversity in terms of variants and/or to improve the adaptation possibilities, the steering gear (11) is characterized in that the engagement line (33) is spaced apart from the axis perpendicular (25).

A composite gear includes: a first member comprising a rotation shaft portion and a disk-shaped web extending in radial directions from the rotation shaft portion; and a second member comprising at least one engaging tooth on an outer periphery thereof and provided being supported by the web so as to surround an outer periphery of the first member. A space is provided between the second member and an outermost peripheral surface of the first member in a radial direction, a space is provided between the first member and an innermost peripheral surface of the second member in a radial direction, and at least one of the first member and the second member is formed to nip another of the first member and the second member from both sides thereof in an axial direction of the rotation shaft portion.

A composite gear includes: a first member comprising a rotation shaft portion and a disk-shaped web extending in radial directions from the rotation shaft portion; and a second member comprising at least one engaging tooth on an outer periphery thereof and provided being supported by the web so as to surround an outer periphery of the first member. A space is provided between the second member and an outermost peripheral surface of the first member in a radial direction, a space is provided between the first member and an innermost peripheral surface of the second member in a radial direction, and at least one of the first member and the second member is formed to nip another of the first member and the second member from both sides thereof in an axial direction of the rotation shaft portion.

The present disclosure pertains to a headstock gear (10) for a feed system of a shearer loader, comprising a plurality of teeth (1), each tooth (1) having a tooth geometry (2). Accordingly, for each tooth (1), the tooth geometry (2) consists of two symmetric S-shaped tooth profiles (S1, S2) which are arranged line symmetrically regarding a radius line, as seen from a view along an axis of rotation (A). Furthermore, the present disclosure pertains to a system comprising a headstock gear and a gear rack (4) comprising several gear rack segments (4) which are arranged next to each other such that a track is provided. The gear rack (4) comprises two different gear rack pitches (6, 6). Moreover, the disclosure pertains to a method for dimensioning a tooth geometry (2) of a headstock gear (10) for a shearer loader, comprising a plurality of teeth (1), the method comprising the step of identifying (S10) all relevant engagement conditions during operation of the headstock gear (10) together with the gear rack (4) and selecting (S20) a tooth geometry (2) on the basis of the identified relevant engagement conditions by minimizing a tooth root tension.

According to an aspect, a device may include a first member, a second member, and a wrist mechanism disposed between the first member and the second member. The wrist mechanism may include a first cylinder portion coupled to the first member, and a second cylinder portion coupled to the second member. The first cylinder portion may be rollably engaged with the second cylinder portion such that movement of the first cylinder portion with respect to the second cylinder portion is configured to cause the first member to move in at least two directions with respect to the second member. The second cylinder portion may be positioned with respect to the first cylinder portion such that a longitudinal axis of the second cylinder portion is orthogonal to a longitudinal axis of the first cylinder portion.

A method for collaboratively constructing a column envelope profile of two flanks of a star wheel tooth includes steps of: determining a tooth width B of a star wheel according to a diameter of the star wheel and a dimension of a root circle; thereafter, geometrically representing positions and shapes of the two flanks by two base columns having parallel axes and the same diameter; wherein: the axes of the base columns are parallel with a center line of the star wheel tooth; on a section of a tooth top of the star wheel tooth, a local projection of a first base column close to a front flank is projected on a lowermost part of a projection of the front flank; and a local projection of a second base column close to a back flank is projected on an uppermost part of a projection of the back flank.

The invention relates to a one-piece gear (1) made of plastic, having an axis of rotation (R), external toothing (10) arranged about an axis of rotation, a concentrically arranged receiving opening (40), an intermediate portion (30) arranged between the external toothing (10) and the receiving opening (40), a reinforcing structure arranged in the intermediate portion (30) having a plurality of openings (32, 33) and reinforcing ribs (34, 35) disposed between the openings, characterized by the following additional features: the external toothing (10) is designed as a helical toothing with a helix angle (W) to the axis of rotation (R), at least some of the openings (32, 33) follow at least approximately the helix angle (W) of the helical toothing with an opening angle (V).

The invention also relates to a method for producing such a gear.